change column after creation?

is it possible to change or alter a column after it is created?

i created a column that i set at 50 characters and would like to change that to a higher number.

is there some way of doing that?  i only ever come across "alter column" in the todo lists for postgresql but have not come across a syntax example in normal docs.


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James M. Burton 
jburton@bfsmedia.com
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